Document Revision History

This table describes the changes to CAOpenGLLayer Class Reference.

Date	Notes
2008-03-11	Clarified that copyCGLPixelFormatForDisplayMask:, copyCGLContextForPixelFormat:, releaseCGLContext:, and releaseCGLPixelFormat: should only be implemented, never called.
2007-07-24	New document that describes the class that provides a context for rendering OpenGL in a layer.

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